Marginal stop for typewriters or the like and mechanism for setting the same



April 7, 1953 I s. KHALIL 2,633,963

MARGINAL STOP FOR TYPEWRITERS OR THE LIKE AND MECHANISM FOR SETTING THE SAME Filed March 31, 1949 4 Sheets-Sheet l Tlcilj.

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INVENTOR.

4TTORNE) v April 7, 1953 2,633,963

S. KHALIL MARGINAL. STOP FOR TYPEWRITERS OR THE LIKE AND MECHANISM FOR SETTING THE SAME Filed March 31, 1949 Tlcr.

, 4 Sheets-Sheet 2 Z? INVENTOR. SE YED K m/1.

Ap 7, 1953 s. KHALIL MARGINAL STOP FOR TYPEWRITERS OR THE LIKE AND MECHANISM FOR SETTING THE SAME Filed March 31., 1949 4 sheets-sheet :5

April 7, 1953 s, KHALIL 2,633,963

MARGINAL STOP FOR TYPEWRITERS OR THE LIKE AND MECHANISM FOR SETTING THE SAME Filed March 51, 1949 4 Sheets-Sheet 4 Tia-LE. Z0

IN V EN TOR. SEYED [044/4 Patented Apr. 7, 1953 MARGINAL STOP FOR TYPEWRITERS OR THE LIKE AND MECHANISM FOR SETTING THE SAME Seyed Khalil, New York, N. Y., assignor to Underwood Corporation, New. York, N. Y., a corporation of Delaware Application March 31, 1949, Serial No. 84,514

marginal stops for typewriters or the like and mechanism for setting the same, and has for a principal object the provision in a typewriter,

or other device employing a movable carriage,

of marginal stops which are settable or adjustable in a more convenient and more nearly automatic manner.

v In the accompanying drawings I have shown a preferred form of my invention for marginal stops and mechanism for setting the same, and a modification thereof. The preferred form is shown in Figures 1 to 12, inclusive, while the modified form is shown in Figures 13 to 16, in-

clusive. I

The preferred form of the invention includes a controlling governor, which causes the marginal stop setting mechanism to operate automatically at the proper time in the adjustment procedure, thereby eliminating the necessity of certain sequential operations such as are required by similar devices of the prior art, which involve the operators having to remember to take each and every sequential step at the proper time in the procedure.

The modified form' of my invention requires more distinctly separated steps in the adjustment procedure.

The preferred form presently described.

of my invention will be Function of my margin setting mechanism To more readily describe the mechanism of my margin setting invention, I shall first and briefly describe the functions of said mechanism for resetting my left and right hand marginal stops.

In my margin setting mechanism, as well as in many other margin setting mechanisms, the usual carriage feed mechanism must be released, that is the carriage must be released from the control of the escapement mechanism, before other operations for setting of said margin stops are carried out.

Many margin setting mechanisms of the prior art necessitate the use, in addition to one or more margin setting levers, keys, etc., of the usual carriage release lever to keep the carriage released during the procedure for setting either one of the marginal stops. 1 I

I use a single lever, which is designated Margin, for operating both the margin setting mechanism and the carriage release mechanism.

. Said Margin lever, which also will be referred to as a margin setting control, is conveniently 19 Claims. (Cl. 197-63) Lil This invention relates to improvements in located at the right end of the carriage and is adapted to be operated in the same manner as the carriage release lever is operated.

When said Margin lever or control is being depressed, it swings in two phases. In the first phase said Margin lever releases the carriage, while in a later, final phase it releases one or the other of the marginal stops from the marginal rack and enables the same to be reset at the desired position. However, as explained hereinabove, the later phase of operation is dependent on positioning the carriage first so that the marginal stop to be adjusted occupies a relation of engagement with a counterstop.

Although for margin setting purposes I release the carriage by said Margin lever, I retain the usual carriage release lever for conventional carriage positioning purposes.

While both the carriage release lever and the Margin lever will release the carriage from the esrapement mechanism, the operation of the carriage release lever is independent of the Margin lever.

For convenience of manipulation of the machine, said carriage release lever is preferably mounted on the left end of the carriage, while said Margin lever is mounted on] the right end of said carriage.

As described above, my Margin lever has a twofold action: first, it releases the carriage, and secondly, it operates my margin settin mechanism.

The dual function of my Margin lever renders my margin setting mechanism manipulative with a minimum of attention required by the operator.

For example, to set the left hand marginal stop by my invention, the Margin lever is depressed through a first phase of operation to release the carriage from control of its feed mechanism. Then the carriage is moved to the right until the marginal stop reaches a position of engagement with the stationary stop. With this position of the margin stop prevailing, the Margin lever is operated through the stated later phase to unlock the marginalstop from holding engagement on its supporting rack and to render it stationary. The carriage remains released from the feed mechanism and is then given the desired position at whichsaid left margin stop is to be active, which automatically results in the desired repositioning of the marginal stop. Then said Margin lever is released and the marginal stop consequently becomes secured in the new position on the rack.

To set the right hand marginal stop, according to my invention, the carriage is released by the very same Margin lever; moved to the left until the right marginal stop reaches a relation of engagement with the counterstop; then moved to the left or the right to a position at which the marginal stop is to be active henceforth, and then the Margin lever is released. This automatically sets the right marginal stop.

From the above it will be seen that a single Margin lever is used, whether it is desired to set the left marginal stop, or the right marginal stop.

Also it will be seen that said Margin lever is depressed in a. single direction for setting either the left or the right marginal stops.

Furthermore, it will be seen that no levers, keys, etc., other than said Margin lever, have to be used for setting either of said marginal stops.

My marginal stops Each of my marginal stops, as .is the case with some marginal stops of the "prior art, includes two members, which will be termed outer memher and inner member. The outer member of each. of my marginal stops slidably embraces the marginal rack, as does the outer member of some marginal stops of the prior art. The inner member of my marginal stop is pivotally mounted on the outer member of said stop on a short shaft, the axis of which is parallel to the direction in which the marginal rack extends.

Accordingly, the inner member of my marginal stop engages and disengages the marginal rack at a right angle to thelength thereof, While the inner member of many marginal stops of the prior art engages and disengages said marginal rack in a direction at a right angle to the engaging direction of the inner member of my marginal stop. 7

The entering edge of the tooth on the inner member of my marginal stop i's'provided with an apex so that it readily re-enters between the teeth of the marginal rack.

Thus, my marginal stops engage the, marginal rack more readily than do the marginal stops of the prior art and are consequently superior to the latter.

After having entered between two teeth of the marginal rack, the tooth of the innerz'nember of my marginal stop, contacts said teeth of the marginal rack more firmly than does the "tooth of the inner member of marginal stops of the prior art, due to the disadvantageous direction of movement of the inner member of the latter.

To each of the inner members of my marginal stops is secured an arm which is adapted to be engaged by my margin setting mechanism for swinging said member to disengage it from said rack, as will presently be described in this specification.

To each of my outer members is secureda tripping leg which is adapted to exercise such control over my margin setting mechanism that either marginal stop is only releasable'from the rack if by carriage movement it is 'fir'st brought into a relation f engagement with the counterstop, as will also be presently described.

A vertical slot is provided in my outer member of each marginal stop and is adapted to be engaged by my margin setting mechanism for maintaining said relation of engagement of the stop which is to be adjusted'said outer member,

together with its inner member, being held at a given position of the frame of the typewriter, as will be fully described in the course of this specification.

Mechanism of my margin setting invention The mechanism of the preferred form of my margin setting invention will be presently described.

An element which is termed herein a dog is pivotally mounted on the frame of the typewriter in substantially lateral alignment with the stationary stop. A spring urges said dog upwardly against a limiting stop. The free end of said, dog extends toward the rear of the typewriter, while the pivoted end of it is toward the front of the typewriter.

The margin lever carries a rod which extends from one end of the carriage to the other end thereof, and is normally in a position which is at a given distance above the surface of said dog. Said rod moves downwardly with the Margin lever so that when said Margin lever is depressed it releases the carriage from the'escapement mechanism before said rod contacts said dog.

Substantially in lateral alignment with the stationary stop there is pivotallymounted on the frame of the typewriter a normally 'verti'caleolumn termed herein controlling governor. A spring means constantly urges "said governor to a position where its center line is vertical but from which position it is laterally swingable about its lower end.

The upper end of said governor is located b'eneath said dog'if neither of said marginal stops approximates a position ofengagement'with the counterstop, there being aworking c1earance'be tween the governor andthe dog.

The -carriage feed mechanism becomes "released in a first phase of downward movement "of 'the Margin lever and then said rod contacts said dog which however cannot 'move down if said governor stands in a blocking position therebelow due to the fact that neither'niargin'al stop is in a position of engagement with the counterstop. Consequently, said governor initially restricts the movement of the Marginleyer downwardly to eifec't'only the release 'of the carriage feed mechanism unless said governor is displaced in a manner to be presently described.

On each outer member of the two marginal stops, as described in the preceding paragraphs, there is secured'a tripping leg.

Assuming the left marginal stop is well to'the left of the counterstop and is desired to be adjusted, the operator will apply operating pressure on the Margin lever, thereby releasing the carriage for movement. Thus with operating pressure maintained onsaid lever, the carriage is moved toward the right, and the tripping leg of the left marginal stop will, at a position near the stationary stop on the frame, engage said controlling governor and displace it from beneath said dog toward the right, thereby -allow ing said dog to move then downwardly to release the margin stop.

When similarly the carriage is moved toward the left to 'set the right'marginal stop, the tripping leg of said marginal Stop will, at-a position near the stationary stop-on the frame, engage said governor'and displace it from beneath said dog toward the left, thereby allowing said dog to move downwardly (as the-operator'continues to exert pressure on the Margin'lever) As the'dog about its pivot out of locking engagement with the marginal stop rack.

Each outer member of said marginal stop is, as

described in the preceding paragraphs, provided with a slot in a location so that when either marginal stop is at rest against the stationary stop such slot is directly beneath said dog. Therefore, pressure on the Margin lever can cause the dog to enter the slot of either marginal stop for marginal stop releasing action only if the'stop is in or assumes a relation of engagement with the counterstop. The dog entering a slot not only releases the marginal stop, as described, but it also prevents the marginal stop from being displaced with respectto the counterstop.

From the above it will be readily seen that when the carriage is thereafter moved to bring a desired future marginal point thereon in line with the center of the typing, the released marginal stop remains at the stationary stop under control of said dog. When the Margin lever is released, the dog swings upwardly to its normal position and the marginal stop is automatically relocked in the desired position on the marginal rack.

M odified form of my invention The modified form of my invention is based upon the preferred form of my invention with the following variation: l

The controlling governor and the tripping legs areeliminated in the modified form of my invention.

Said rod is adapted to normally be in close contact with said dog.

The Margin lever has no connection to release the carriage, and instead the carriage is released by the usual carriage release lever,

The operation of my modified form is as follows: V

In order to set the left hand marginal stop, the carriage is released from the escapement mechanism, as usual, by depressing the carriage re lease lever with the left-hand, and the carriage is moved toward the stationary stop until the left marginal stop contacts the stationary stop. Then the Margin lever is depressed with the right hand and held in the depressed position while the operator moves the carriage toward the left or right until the desired writing position at which the marginal stop is to be active is set in registration with said center of the typing. When this position has been reached, both the Margin lever and the carriage release lever are released. The release of the carriage release lever re-engagesthe carriage with the escapement mechanism, and the release of the Margin lever allows the marginalstop to relock in the set position on the marginal'raok, and thus the left marginal stop is reset to the desired position.

In order to set the right-hand, marginal stop, the same carriage release lever and the same Margin lever are operated. as described above.

However, in this case the operator moves the carriage toward the left-to bring the right marginaltstop in contact with the stationary stop, and, as soon as said-stationary stop is reached,

the Margin lever is depressed and then the car-- riage is moved toward the right or left until the writins-ppsi ioniat wh h. ther ht m n l st p;

is to be active is in registration with said center of thetyping. As soon as this position is reached, both the Margin lever and the carriage release lever are released, thereby re-engaging the right marginal stop with the marginal rack and reengaging the carriage with the escapement mechamsm.

Referring to the drawings, which are merely given by way of example to illustrate the invention:

Figure l is a plan view of a portion of a carriage showing the preferred form of the invention, which includes a marginal rack and carrying my new marginal stops, my Margin lever and its associated longitudinal rod, my improved controlling governor, and other features of the invention, which will be hereinafter described in detail;

Figure 2 is a front elevational view taken along the lines 2-2 of Figure l and showing details of my new and improved marginal stops;

Figure 3 is a front elevational view taken alon the lines 3-3 of Figure 1 and showing my controlling governor;

FigureBa is a right end view of the mechanism shown in Figure 3, the end plate of the carriage having been omitted for the sake of clarity;

Figure 4 is an elevation similar to Figure 3, with the exception that'the'rod controlled by the Margin lever has, in an infinitesimal portion of an operating cycle, moved into contact with the dog;

Figure 4a is similar to Figure 3a, except that the positions of some of the elements have changed slightly;

Figure 5 is an elevational view similar to Figures 3 and 4, with the exception that the rod has tripping leg or stud on the marginal stop has engaged and displaced the controlling governor, thereby allowing the dog to move downwardly so that it may enter the slot formed in the marginal stop and thereby disengage its rack-engaging member from the rack;

FigureBa is an end view showing the new relation of the parts depicted in Figure 6;

Figure '7 is a view similar to Figure 6, except, that the dog has entered the slot in the marginal stop and is in engagement with a stud on the: rack engaging member, so that further downward movement of the dOg will disengage the member.- from the teeth of the rack. Figure '7 also shows:

a tripping member on the marginal stop as having engaged and displaced a member connected to the margin release key of the typewriter;

Figure 7a is an end view showing the relation of the elements depicted in Figure '7;

Figure 8 is a view similar to Figure '7, except that the rod and the dog have moved further downwardly thereby disengaging the rack engaging member from the teeth of the rack, thereby makin it possible to move the carriage to a desired position while the marginal stop is maintained stationary in respect to the counterstop; Figure. 8a is an end view showing the position relation of the elements as depicted in Figure 8;

.t i r i a ,viaw S ila is u e 8' wi the rectangular body' portion 61, which has formed integral therewith an apex portion 68 havin sides which are angular to facilitate its entering into the space between any two teeth formed on the rack 43. A spring 69 (Figure 1) has one end When the stud 64 is depressed by a dog member to be presently described, the marginal stop looking member 61 is swung transversely of the rack 43 against the urge of said spring 69 about the pin 51 as an axis, in a counterclockwise direction as viewed in Figure 8, and thereby the tooth engaging member 66 is disengaged from the teeth of the rack 43. The body portion 62 has a downwardly extending tab 10, which is in vertical alignment with the side 48 of the marginal stop. The tab carries a stud 1i, upon which is journalled a pawl lever 12. I

A spring 13 has one end secured to the tab 10 andthe other end secured to the pawl 12, so that the spring urges the pawl in a counter-clockwise direction, as viewed in Figure 2. A stop pin 14 is carried by the tab 10 and is so positioned thereon that the pawl 12 is normally held in position against rightward swinging displacement. The pawl I2 has a beveled face 15. The left edge of this pawl terminates in the rounded knob or lobe 16. The functions of both the beveled edge and the knob will presently be described. The U- shaped channel defined by the sides 46 and 49 and the bottom portion 41 forms a working fit with the marginal rack 43, so that the marginal stop may be easily moved along the rack after the ,member 66 is disengaged from the teeth of the rack. Mounted in the marginal stop, between the vertical portions 52 and 54 and forming a working fit with the surface of the marginal rack 43, is a block member", which is secured therein in any suitable manner, for example, by means of pins '18.

The frame 29 of. the typewriter, see Figures 2, 3, etc., has an opening I69 formed therein. Pro-.' .jecting through this opening and extending into the path of movement of the pawl 12 of the marginal stop 46 is a counterstop member 19, which ,isoperatively connected in amanner not shown to a conventional margin release key of the typewriter. Said counterstop is engageable by each of the marginal stops 46, 46a in the position each such stop defines. Since margin release arrangements are old in the art and do not form a part of the present invention, it is not deemed necessary to show the details thereof. However,

it will be understood that the normal position of the counterstop 19 is shown in Figures 2 and 3. Lightly active spring means, not shown, normally urge the stop 19 against the right edge of the opening I09 in the frame 29.

When the carriage is moving to the left, which is the normal movement as the typing progresses,

, the lobe 16 on the pawl 12 engages the counter stop 79 and moves it, against the urge of its spring, into contact with the surface ill of the opening I69- This means that when the end of a line of typing is reached, the lobe 16 of the pawl displaces the counterstop 19 to the left, and by well-known 'means the motion so given the 'counterstop'causes operation-of a usual line-end lockmechanism. Normally, the counterstop 19,

as statedabove, has its right edge in contact with the surface Ill] of the opening 109 and the left center of the typing.

When the end of a line of typing is reached and the lobe 16 displaces the stop I9, as described above, and then it is desired to add several additional letters to the line being typed, the operator merely depresses th margin release key on the typewriter and thereby withdraws the counterstop'19 sufficiently downward to clear the lobe 76. As this is done, the counterstop springs to the right, so that its right edge is in contact with the surface llll. Therefore, when then the margin release key is released by the operator, the counterstop 19 moves upwardly to its normal position, and in so doing it engages and moves upwardly along the beveled face 15 of the pawl, displacing the latter idly leftwardly against the urge of the spring 13, so that the stop becomes positioned to the right of the pawl 12 and additional typing may then be effected. When thereupon the carriage is returned tobegin a new line of typing, the beveled surface 15 engages the stop 19, and the pawl 12 swingablyyields in a clockwise direction about its pivot H. As soon as the pawl 12 passes the stop 19, it returns to its normal position against the stop pin 14 under the urge of the spring 13. This pawl arrangement is not new in typewriters and does not form part of the invention. It is merely described to show the flexibility of my new and improved marginal stops. The lefthand marginal stop 46ais comprised of elements which substantially correspond to those described in connection with the right-hand marginal stop 46, with the exception of the arrangement of the tab 10. Elements of the left-hand marginal stop 46a are designated by the same numerals as the corresponding elements of the right-hand marginal stop, except that they are each followed by the exponent letter a. As to the tab '10 'on the marginal stop 46, which carries the movable element 12, there is a substantially corresponding tab rigid on the left marginal stop 4611 which is designated by the numeral H2. This tab is generally rectangular in form and has in the lower right-hand corner thereof a lobe I 13, which limitedly engages the counterstop 19 when the carriage is returned to begin a new line of typing.

Pivotally mounted on the frame of the typewriter and substantially laterally coincident with the-counterstop I9 is an element'80, which is termed controlling governor? The governor 86 is journalled on a stud 8|, which is carried on the frame 29 of the typewriter. This governor is generally rectangular inform and has its upper end 82 angular, as shown in Figure 5a, so that r it is parallel to the lower surface of the dog. I05

axis i vertical.

A bracket member 86 is mounted on the frame 29 o'f the typewriter, and, as seen in Figure 3a it is secured to the frame 29 by a horizontal portion" 81 and has a vertical portion 88 branching out in an upper U-shaped portion 89 which, as

' may be seen in Figure I, has spaced parallel sides 90 and 9!. I The vertical portion88' has between the base i8? and the .U..-shaped portion 39 a projecting ear 92, which carries a stud .93. A shaft at is mounted in ali ned holes formed in the sides so and 9| of the ,U-shaped channel 36 and iournalled on this shaft are the two legs 95 and 5'! of a yoke member .98. The yoke member 93. as may best be seen in Figure 3a, is threadeolly engaged by a long shouldered screw 99, which has journalled thereon, between its head loll and the yoke member .98, a sleeve IIII, and abuttin the end of the yoke member .98 is afree washer I02, so that the sleeve I] and the washer I912 are freely rotatable.

This assembly is herein termed a dog and is hereinafter designated generally by the numeral I05. The U-shaped portion at has a stop pin I03 positioned in aligned holes therein for limiting the downward movement of the dog I35, and a second stop pin I04 is positioned in other aligned holes in the sides 89 and SI for limiting the extreme upward movement of the dog I as.

The yoke member 38 has a c oss-pin Hi6, and a pr 1 7 has one end secured to the pin its, and the other end is secured .to the stud 93 carried in the car 92, so that it constantly urges the d 65 upwardly and into contact w th the stop pin I04.

The normal relation of the dog 1B5 with respect to the upper end 8.2 of the g vernor to is such that a clearance I08 is provided, as can be s n in Fi ures .3 and 3a. This cl arance allows h q re dges or the upper su face 82 of the governor 80 to clear the dog I 25 as the governor swings on its axis ,8] to its normal position.

When the governor is displaced by the trippin leg 59, the square corners have a function which will presently be described.

Referring to Figure 1, it will be noted that the tripping legs or studs 59 and 59a carried by the right and left-hand marginal stops project forwardly beyond the main body .of my controllin governor to, so that when the carriage is moved to the left far enough for the leg 59 to enga the governor '89, the latter will be displaced swingably in a counter-clockwise direction about the pivot BI, as shown in Figures 6 to 9, inclusive. Similarly if the c'arriageis moved far enough to the right, the governor Bl! will be engaged by the tripping leg 59a and will be displaced swingably in the opposite direction (clockwise) about the pivot BI. Normally, the governor 80 stands upright beneath the dog I05, spaced therefrom by a slight vertical clearance I 08 and thus limits the movement of the dog I downwardly to the amount of the clearance I08. This means that the movement of the dog I05 downwardly is arrested by the governor 80 unless one or the other of the marginal stops 46, Mia is stationed in or moved to a position wherein the governor 8D is displaced by one of the tripping legs 59, laterally to one or the other side from vertical position, thereby allowing the dog N35 to move downwardly unobstructed, so that it can perform functions which will presently be described.

Operation clusive, all of these figures include a reference line which is designated by the numeral H4, so that as the description of these figures progresses the movement of the carriage toward and away from this reference line may :be readily seen.

Supposing it is desired to reset the right-hand marginal stop .46, Figure 3, to anew location, and assuming also that the position of the carriage is such that the marginal stop 46 is away from the counterstop T9. The first step is to depress the Margin lever or setting control 26 on the right end of the carriage as far as it will go. In the partial downward movement of the Margin lever 25 thus effected, the rod 34 moves to a position such as i illustrated in Figures 4 and 4a, where it contacts the dog I05, During this partial downward movement which isalways possible, the arm 3| aotuates the conventional mechanism for releasing the carriage from the control of the letter-feed escapement. Duringthe next increment of movement of the rod 34 downwardly, the dog I85 encounters the upper end 82 of the controlling governor and is arrested thereby. The carriage having been released for movement, the operator then, while still exerting pressure on the lever 25, moves the carriage toward the left, thereby bringing the tripping leg 59 on the right marginal stop nearer and nearer to the governor 86. As thi movement progresses, the leg 59 on the marginal stop 46 engages and displaces the governor 8i] by swinging it in a counter-clockwise direction, as viewed in Figure .6, so that the dog I515 consequently, due to the pressure still exerted on the lever 26, will move downwardly further, and will contact upon the upper end of the portion it of the right-hand marginal stop (the position shown in Figures 6 and 6a). As this takes place the stop pawl 72 has not yet come into contact wit the counterstop I9. However, the operator continues to move the carriage to the left until as shown in Figure 7 the lObe I6 of the pawl 12 has engaged the .counterstop i9 and has moved it to a position where its left face is in contact with the surface I I I of the opening I05 in the frame 29. Meanwhile the controlling governor 80 has been displacedstill further to the left, and the dog I05 because of the continued operating force applied on the lever 26 has moved down the incline 69 on the right marginal stop and has thereby been guided into the open slot as to a position in contact with the stud 64 on th marginal stop looking member 61.

During the above-described movement, when the tripping leg 59 engages the governor so to shift it from the position shown in Figure 5 to the position shown in Figure 6, the upper righthand corner of the governor 80 moves the rod 34 upwardly (due to the fact that the upper end 82 of the governor 80 has square edges instead of rounded edges), and this provides momentarily a resistance in the movement of the carriage. On the other hand, when the rod 34, after having been shifted upwardly via the right-hand square corner on the upper end of the governor 80, suddenly drops down on to the top flat edge of the comparatively wide vertical portion 5a of the marginal stop, the position shown in Figure 6, with a perceptible shock which can be felt by the operator through the finger or thumb which is depressing the Margin lever 26, this shock is a perceptible indication to the operator to decelerate the speed at which the carriage is being moved, as the marginal stop to be set is by that time approaching the stationary stop.

The magnitude of this shock depends upon the width of the governor and the drop of the rod 34. By the width of the governor is meant the linear dimension of the square edge 82. By the drop of the rod 34 is meant the distance it moves downwardly after it leaves the right-hand corner of the upper edge of the governor and arrives on the tion 54 of the marginal stop, as viewed in Figure 2. The greater this width, the greater the magnitude of said zone. In Figure 2 it will be noted that the wide portions 54 and 54a. are opposite each other todecelerate for right and left-hand marginal settings, respectively.

As theslot 50 of the marginal stop registers with the dog I05 and the operator continues to exert pressure downwardly on the Margin lever 26, the dog I65 acts vertically against the stud 64 in the marginal stop looking member 6i and causes the latter to swing in respect to Figure 80.

I in a counter-clockwise direction about its axis 51,

thereby disengaging the tooth-engaging member 66 on its lower end from the teeth 45 of the marginal rack 43. This is the position shown in Figures 8 and 8a. It will thus be seen that the governor B and the portion 54 on said marginal stop constitute in association with the dog I05, a means to suppresss-top releasing operation of the control 26 until the carriage is stationed in or is moved to the position which the marginal stop After the marginal stop has become released, the operator, while still keeping the lever 25 depressed, moves the carriage to the right or the left until the carriage is in the position where it is desired to have the lines of typing terminate. From Figure 9, wherein the carriage is shown moved leftwardly, it will be noted that, as the operator starts this movement of the carriage, the dog I is contacted by the left edge of the slot 5!] formed in the marginal stop and thereby the latter is held stationary. If the carriage is moved leftwardly the dog I05 is contacted by the right edge of the slot 50. When the desired point is reached, the operator releases the Margin lever 26 and the following events occur: The setting control 26 with its associated bar 34 returns to the normal position seen in Figures 3 and 3a. In the first part of such return the dog I05 swings about its axis in a counter-clockwise direction, due to the urgeof the spring I511. The marginal stop locking member 6|, under the urge of the spring 59, is'moved in aclockwise direction until it comes to rest against the stop tab 58, by which time the tooth-engaging member 56 has entered intothe space between the two nearest adjacent teeth of the rack 43. Consequently the right marginal stop 46 has become moved to reset and locked in the new desired position. The restoring movement of the Margin lever 26 continues after the dog 105 has reached normal position, and in such continued movement the carriage becomes restored to the control of the carriage feed mechanism.

" It will be understood that the sequenceof events described above occur in very rapid suc- "the steps employed are exactly the same as described above for settingtheright-hand marginal stop 46, except in reference to the direction of motion of the carriage required to bring the stop-46a into contact with the counterstop 19. For example, if it were desired to set the left marginal stop46a with the position of the carriage prevalent as in Figure 2, the operator would apply pressure on the Margin lever 26. This causes the rod 34 to move downwardly into contact with the dog I05; and during this time the arm 3| on the Margin lever 26 actuates the mechanism for disengaging the carriage from the escapement mechanism. Then during the next incr'ement of movement, the clearance space I08 between the dog I05 and the upper end 82 of the governorifl is'taken up so that the dog comes to rest on the governor end 82. 'Upon being freed the carriage is moved to'the right until the tripping leg 59a on the marginal stop 46a engages the governor '80 and causes it to swing about its axis 8| in a clockwise direction. As soon as the upper end 82 of the governor is moved from under the dog I05, the rod 34 will resume its downward movement due to the fact that the operator continues to press the Margin lever downwardly. The left marginal stop is by this time in an approximate position below the dog I05, the latterof which-then moves further downward and contacts the pivotal surface 600. on the left marginal stop. As the marginal stop reaches a position in which its lobe-engages the counterstop !9, the dog is guided into the open vertical slot 59a of themarginal stop 46a and into contact with the stud 64a of the marginal stop locking member 6| a. Further movement downwardly of the rod 34, effected under sustenance of operating pressure on the Margin lever 26, causes the locking member 61a to swing about its axis 51a in a direction to disengage the tooth-engaging portion 66a from the teeth of the marginal rack. While this is occurring, the lobe H3 is in contact with the counterstop 19, generally in alignment with the center of the typing.

As? soon as the locking member am is disengaged from the rack, the operator moves the carriage toward the left or to the right until the point is reached where it is desired to have the left marginal stop active in the future. The operator then releases the Margin lever 26, allowing the locking member lilo. to re-engage the teeth of the marginal rack, and, at the same time,

all of the elements involved the operation return to theirnormal positions.

Obviously, if the marginal stop which requires adjustment happens to be in a position against the counterstop 19 when it is decided to effect its adjustment, then the Margin lever 26 is oparable to its full extent without interruption, this resulting in the immediate'release of the margin stop'from the rack, and in its temporary localization in respect to the frame. Obviously, the

full movement of the lever 26 will make the operator'conscious of the fact that adjustment of the margin stop will then immediately ensue if the'carriage is merely'moved to the. position where" the marginal stop is desired to be active, themarginalstop becoming fixed in adjusted position upon release of the lever 25.

From the abovedescription it will be seen that my new and improved mechanism operates in amanrier requiring a minimum of attention and concentration by the operator, as all the operator has to do isto applyoperating pressure on the Margin lever, move the carriage for the marginal stop to be reset to become located against the-counterstop 1G, and then move the carriage in the appropriate direction to the point where the marginal stop is to be active in the future, the setting operation being concluded by the operator releasing the Margin lever 26. No separate and sequential operations of difierent controls are necessary. The operator does not have to remember any difiicult and varied procedure and the setting operation is enected almost as rapidly as is the returning of the carriage to begin a new line of typing.

The modified form of my invention Operation of the modified form of the invention First, the operation will be described in connection with resetting the right-hand marginal stop 38 to a new desired location. The first step is to depress the carriage release lever 23 on the left end of the carriage. This releases the car riage from the escapement mechanism, so that the carriage may be moved. While the lever is held operated, the operator moves the carriage toward the left until the right marginal stop con tacts and moves the counterstop 19 on the frame into contact with the left side edge H l of the opening Ice in the frame 29. The operator then, additionally to the carriage release lever 23, depresses the Margin lever 26, thereby moving the rod 34 downwardly against the dog 35 and thereby causing the latter to move downwardly into the slot 55 against the urge of the spring lei. This is the position shown in Figure 16.

As the operator continues to exert pressure on the Margin lever 26, the dog #95, acting against the stud 84, causes the marginal stop locking member ti to swing in a counter-clockwise direction, as viewed in Figure 15, thereby disengaging the tooth-engaging member 65 on the lower end of the locking member from the teeth 45 of the marginal rack 43. Then the operator, while still continuing to exert pressure on the Margin lever 26 and the carriage release lever 23, with the right and the left hand respectively, moves the carriage toward the right or to the left until the carriage is in the new position at which the right marginal stop is to be active. As soon as this point is reached, the operator then releases both the carriage release lever 23 and the Margin lever 26, thereby causing the locking of the right-hand marginal stop in the desired position and the restoration of the carriage to the control oft-he letter feed mechanism.

The locking of the stop is effected in the following manner: As soon as the Margin lever 26 is released, it and the rod 34 are moved upwardly under the urgeof the spring 21. As the rod 34 starts moving upwardly, the dog I also moves upwardly under the urge-of the spring Ill? until it is arrested by the stop HM. Now, as the dog "35 moves upwardly out of the slot 50, the stud E4 on the marginal stop locking member 6! moves upwardly under the urge of the spring 69 '16 until the tooth-engaging member E58 on the lower end of the member 6! enters between two adjacent teeth of the marginal rack 43, and finally said locking member is arrested by the tab 53 on the marginal stop and overhanging the slot 59.

If it is desired to reset the left marginal stop to a new position, the operation is similar to that decribeol above, except for the direction of movement of the carriage. For example, the operator depresses the carriage release lever 23 with the left hand and moves the carriage toward the right until the left-hand marginal stop comes to rest against the counterstop 19 on the frame of the typewriter. When the left marginal stop is in this position, its slot 55a is beneath the dog 4335. The operator then depresses the Margin lever 26, thereby moving the rod 34 downwardly. The rod 34 in turn moves the dog H downwardly into the slot a in the left marginal stop and this disengages the marginal stop looking memher from the marginal rack and at the same time renders the marginal stop stationary. Then the operator, while still holding both the carriage release lever 23 operates also the Margin lever 26 and moves the carriage toward the left or the right until the point at which the left marginal stop is to be set is in line with the center of the typing. Then the operator releases both levers, thereby re-engaging the carriage with the escapement mechanism and locking the left marginal stop in the desired new position.

Obviously, in the event the marginal stop to set is not fully in carriage-movementlimiting engagement with the counterstop 79 when the operator applies operating pressure on the lever 26, then the dog H35 will be blocked against effective operation inasmuch as it clashes against the top level 68 of the marginal stop. This will compel the operator to move the carriage to 10- cats the marginal stop against the counterstop if the lever 25 is to be operative for marginal stop releasing function.

It is to be understood that the above detailed description of the present invention is intended to disclose an embodiment thereof to those skilled in the art, but that the invention is not to be construed as limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of being practiced and carried out in various ways without departing from the spirit of the invention. The 1anguage used in the specification relating to the operation and function of the elements of the invention is employed for purposes of description and not of limitation, and it is not intended to limit the scope of the following claims beyond the requirements of the prior art.

What is claimed is:

1. In a typing machine having a frame, a carriage movable thereon, escapement mechanism for controlling the movement of said carriage thereon in one direction, a marginal rack carried on said carriage and settable marginal stops on said rack, a stationary stop on said machine, locking means on each marginal stop urged into locking engagement with said rack, dog means on said machine for disengaging the locking means of either one or the other of said marginal stops and holding the latter stationary as the carriage is subsequently moved, a margin-setting lever means on said carriage adapted, when actuated, to release the carriage from said cscapement mechanism and then to actuate said do means, and arresting means on said machine in the path of escapement mechanism,

movement of said marginal stops for holding said lever means immobile after said carriage has been released, said arresting means being adapted to be displaced by either one of said marginal stops as the latter approaches said stationary stop by the movement imparted to the carriage by an operator, thereby enabling said lever means to actuate said dog'means.

2. In a typewriting machine having a carriage movable lineally on a frame and having a releasable .carriage feed mechanism, the combination of a marginal rack mounted on said carriage, a mar in the initial phase of its movement to release said carriage feed mechanism, a stationary stop on said frame in alignment with the center of the typing, a dog operatively supported on said frame for engaging said locking means and unlocking said marginal stop and holding it against movement when the carriage is subsequently moved to reset the same, means moved by said margin-setting lever for operating said dog, and a controlling governor on said frame adapted to arrest said last means after said initial phase of movement of said lever, said governor being disposed in the path of movement of said marginal stop and displaced thereby as the operator moves the carriage to bring said marginal stop into engagement with said stationary stop, thereby freeing said last means tooperate said dog for the latter to perform its aforesaid function as said lever completes its movement,

- 3. In a typewriting machine having a carriage movable lineally on a frame and having a releasable carriage feed mechanism, the combination 'of a stop member on said frame, a marginal rack mounted on said carriage, a marginal stop carried on said rack, a locking member on saidmarginalistop constantly urged into locking relation with thelteeth of said rack, guide means formed on said marginal stop extending toward said look ing member, a margin-settin lever on said carriage adapted to release said carriage feed mechanism during an initial portion of the movement of said lever, an actuating rod also moved by said lever, a dog on said frame adapted subsequently to said initial portion of movement of said lever to be actuated by said rod for disengaging said locking means from said rack, and a governor on said frame for arresting said dog after said carriage is released, said governor being disposed in 7 the path of and adapted to be displaced by said marginal stop as the latter approaches the stop member on the frame, whereby said dog is freed to be moved downwardly by said rod and is guided into engagement with said locking member by said guide means.

, 4. In a typewriter in combination, a frame, an a carriage slidably mounted on said frame and operatively connected to said escapement mechanism, a marginal rack carried by said carriage, right and left hand settable marginal stops, each carrying a pivoted memberengaging said rack and a tripping leg; and a combined marginal stop releasing, holding, and resetting'mechanism comprising a universal dog, a driving unit, and a controlling element mounted respectively at a fixed position on said 7 frame, on the carriage and at another fixed position on said frame; said driving unit, when force is appliedthereto, to reset said right marginal stop, being adapted to release said carriage from said escapement mechanism, enabling the same to slide toward the left near the limit of its stroke, thereby, by means of the tripping leg of said marginal stop, actuating said controlling element and enabling said dog to free said member of said marginal stop from said rack and to hold said stop stationary as said carriage is moved toward the right up to the position at which said stop is to be reset, said driving unit, when said force is removed therefrom, enabling said carriage to re engage with said escapement mechanism and at the same time releasing said dog and enabling said member of said marginal stop to re-engage a tooth of said rack which is in registration with said dog.

5. In a typewriter in combination, a frame, an escapement mechanism mounted on said frame, a carriage engaging said mechanism, a lever for disengaging said carriage from said mechanism, a plurality of marginal stops slidably mounted on said carriage, a dog for resetting either of said marginal stops along said carriage, a driving unit adapted to impart power first to said lever for disengaging the carriage from said mechanism and then to impart power to said dog, and a controlling element on said frame in the path 'of and displaceable by said stops and normally preventing the delivery of power to said dog for actuating the same, said element being adapted to be displaced by either one of said stops to effect the actuation of said dog by said power.

6. In a self-adjusting margin device, a frame, a carriage, a marginal rack mounted on said carriage, a plurality of settable marginal stops on said rack, escapement mechanism operatively connected to said carriage, means for releasing sai-d carriage from said escapement mechanism, dog means on said frame for releasing either one of'said marginal stops from said rack, said dog means being adapted to hold either one of said stops in a predetermined position with respect to a point on said frame, governing means actuated by the impactthere against of the stop to be set for rendering said dog means effective, means for reengaging said stops on said rack, means for re-engaging said carriage with said escapement mechanism, and a driving unit to cause each of saidmeans to operate successively.

'7. In a typewriter, a frame, a stationary stop thereon, a carriage, marginal stops thereon, manually operable means to be actuated by an' operator during at least a portion of a marginal stop resetting operation, and means to impart to an operator a perceptible indication, via said manually operable means, as the operator is moving said carriage, that the marginal stop to be reset is near the stationary stop and the carriage should be decelerated."

8. In a typewriting machine having a carriage lineally movable on a frame and having a releasable carriage'feed mechanism, the combination of two marginal stops, rack means extending in parallel to the carriage and along which said stops are individually adjustable, locking means carried on each stop and biased to engage said rack means for holding the said stops individually adjusted, counterstop means on the frame engageable by each stop in a position of the carriage which each stop defines,

each said locking means including a part operable transversely of the rack means to unlock its related stop, dog means on said frame op- 19 erable transversely of the carriage to release the locking means of whichever stop is brought into a position of engagement with the counterstop means, a, margin setting control on the carriage,

means by said setting control unless one or the other of said stops is in or reaches a position ofengagement with said counterstop means, said setting control capable of some initial movement unrestricted by said suppressing means,

n eans controlled by said initial movement of 1 said setting control to release said carriage feed gnechanism, and .means to disable said suppressing m n -bii-m emsn of e -o s dtops intoitsposition of engagement with the counter.- stop means, whereby after an initial imparta- .tion of movement to said setting control the carriage is freely movable bring either stop into a relation of engagement withsaidpounterstop means, and whereby a--iurther movement can then be imparted to said setting control which will cause the rod :means to impart a movement to the :dog means whichwillrelease the locking means of the stop which-is in said relation of engagement with the ,counterstop means.

-9. :In a typewriting machine having a carriage movable lineally on a trams and having a releasable carriage }feed meohanism, the combination of a marginal stop, means to support said marginal stop toradjnstment in a direction parallel with the movement of Y the carriage to define diflierent, marginal positions, means to lock-the marginal stop in adjusted position and in condition for release, ,a marginal stop set.- ting control, means always operable by said control to release said feed-mechanism, means adapted to respond to said control to release said lock-means, and means associated with said;lock releasing means and controlled-by said marginal stop, to govern the former to-respond effectively to said control only if the carriage is in the position which said marginal stop happens to define or upon movement of the carriage to such position.

10. ,In -a typewriting machine having .a carriage movable lineally on a frame :andhavi-ng a releasable ,Qa-rria-ge feed mechanism, the combination of a marginal stop, means to support saidymarginal stop for adjustment in :a direction parallel-with the movement of the carriage-to d fin lifi ren mar na p s t m a t lock the marginal stepin adjusted position and in condition for release, amarginal stop setting control, means always operable by said control to release I said feed mechanism, means adapted to respond'to said control torel ease said lock means, means associated with J said lockreleasing means and controlled by said marginal stop, to govern the former to ;respond effectively to said control only if the carriage is in the position which said marginal stop happens to define or upon movement of the-carriage to such position, and a carriage release control carriedon thev carriagefor releasing saidfeed mechanismwithout releasing said lockmeans.

.11. ,In atypewriting machine having-acarriage movable lineally on a frame and having areleasable carriage feed mechanism, the combination of a marginal stop, means to supportsaid marginal stop for adjustment in parallel with themovement of the carriage, means-to locktheimarginal stop in adjusted position and in condition for release, a counterstop with which said marginal stop assumes an engaged relation in limiting carriage travel in one direction, a manually operable control, means responsive always to said control to release the carriage feed mechanism of the machine, a device adapted to respond to said control to release the locking means-for the marginal stop and additionally to render the marginal stop stationary with respect to the counterstop, and operation governing means for said device including means adjustable along with said marginal stop, toeause said device to respond to said conllIOl'IOlBlTGClElVB action only in the event the marginal stop and said counterstop are in or approximate said engaged relation, or consequently to establishment of such relation through carriage movement nnder condition of operating force maintained on said control.

12. In a typewriting machine-having acarriage movable lineallyon a frame and having a releasable carriagefeedmechanism, the combination of a marginal stop, means to support-saidmarginal stop for adjustment in parallel with the direction of movement of the carriage to define different marginal positions, means to lock the marginal stop in adjusted position and in condition for release, a marginal stop setting control, means operableby manipulation of said control in one direction to release said locking-means, marginal stop controlled governing-means to control effective operation of saidoperable meansby said control to ensueonly-i-f said carriage is in the position said marginal stophappens-to define, or upon establishment of such position under condition of manipulative forceapplied onsaid controlin said one direction, and othen neans operable ;by manipniation of said control said one direction, independently of said governing means,- to release said feed mechanism.

13. In a typewritingmachine having a carriage movable lineally on -a frameandhavinga releasabiecarriage feed mechanism, the combination of a marginal stop, means-to support said marginal stop for adjustment inparallel with the direction of movement of-the earriagermeans to-lock the marginal stop in a ll ted p0ition and in condition forrelease, a counterstop with which said marginal stop assumes an engaged relation in limiting carriagetravel in one direction, a marginalstopsetting control on the carriage, means operable bymanipulationpf said control-in one direction to -release said locking means, marginal stop controlled governingmeans to control effective operation of-said operablemeans by said control to ensue only if said marginal stop and counterstop are in said engaged relation or upon establishment of said relation under condition of manipulative force applied on said control in said one direction, and other means operable-by-manipulation of said control in said onedirection, independently of said governing means, to release said feed mechanism.

14. In a typewriting-machine having a carriage movable lineally on a frame and having a releasable carriage feed mechanism, the combination of a marginal stop, means to support said marginal stop on the carriage foradjustment in parallel with the movement of the carriage, means to lock. said marginal stop in different adjusted positions comprising a row of teeth on the carriage and a lock on the marginal stop normally in stop locking engagement with said teeth and releasable there from, a counterstop on the frame with whichsaid aesaoos in any position of the carriage, means controlled by said marginal stop to govern operation of said dog means by said operating means to ensue only upon operating force on said control if the marginalstop approximates said position of engage- I ment with said counterstop or following establishment of such position by carriage movement under condition of operating force applied on said control, and means readily responsive to said control independently of said governing means to release said carriage feed mechanism.

15. In a typewriting machine having a carriage member movable on a frame member and having a releasable feed mechanism for said carriage member, the combination of a marginal stop on one of said members adjustable in a direction parallel to the movement of the carriage member to define difierent margin positions, means to lock said marginal stop in said positions and in condition for release, a marginal stop setting control, means always operable by said control to release the said feed mechanism, means adapted to respond to said control to release said lock means, and means associated with said lock releasing means and controlled by said marginal stop to govern the former to respond effectively to said control only if the carriage member occupies substantially a position defined by said marginal stop, or upon establishment of such position, said governing meanscomprising marginal stop controlled means on the other one of said members to block efiective- 'operation of said lock releasing means in all positions of the carriage member except when the carriage member nears the marginal position defiiifed by said stop, and comprising also surface means on the marginal stop cooperative with said lojck releasing means to block it thereafter until the carriage member reaches substantially the exact position which the marginal stop defines. 1 i

16. In a typewriting machine having a carriage member movable on a frame member and having a releasable feed-mechanism for said carriage member, the combination of a marginal stop on one of said members adjustable in a direction parallel to the moyement of the carriage member to define different margin positions, means to lock said marginal stop in said positions and in condition for release, a marginal stop setting control, means adapted to respond to said control to'release saidlock means, and means associated with saidlock releasing means and controlled by said marginal stop to govern the former to respond effectively to said control only if the carriage member occupies substantially a position defined by said marginal stop, or upon establishment of such position, said governing means comprising marginal stop controlled means on the other one of said members to block eifective operationof said lock releasing means in all positions of the carriage member except when the carriage member nears the marginal position defined by said stop, and comprising also surface means on the marginal stop to block said lock releasing means against operation until the carriage member is moved substantially to the exact position which the marginal stop defines.

17. In a typewriting machine, having a carriage member movable lineally on a frame member and having a releasable feed mechanism for the carriage'member, the combination of a marginal stop, means to support said marginal stop for adjustment on one of said members in parallel with the direction of carriage movement, means to lock said marginal stop in different margin defining positions of adjustment on its supporting member including a row of teeth on said member and a locking member on said marginal stop releasable from said teeth, an element on the other one of said members operable transversely of said carriage member to release the locking member of the marginal stop, a governor for said element supported on the said other member for swinging movement in the direction of carriage movement from a position blocking margin stop releasing operation of said element to a position freeing it for operation, and means on said marginal stop to swing said governor to a position freeing said element for operation as the carriage member is moved to the position the said marginal stop defines.

18. In a typewriting machine having a carriage movable lineally on a frame and having a releasable carriage feed mechanism, the combination with a marginal stop on the carriage, means to support said marginal stop on the carriage for adjustment parallel to the direction of movement thereof, means to lock the marginal stop on the carriage in adjusted position and in condition for release, a counterstop on the frame with which said marginal stop assumes an engaged relation in limiting carriage travel in one direction, a marginal stop setting lever on the carriage having an initial phase of movement to effect the release of the carriage feed mechanism, means operable by said lever in a further phase of movement thereof to unlock the marginal stop from adjusted position on the carriage and to render it stationary with respect to the counterstop, and means including governor means supported on the frame and controlled by the marginal stop to block stop-unlocking operation of said operable means by said lever unless the marginal stop is in or approximates engaged relation with said counterstop or until the marginal stop is brought into said engaged relation.

19. In a typewriting machine having a carriage movable lineally on a frame and having a releasable carriage feed mechanism, the combination of a marginal stop, means to support said marginal stop for adjustment in parallel with the movement of the carriage, means to lock the the marginal stop and additionally to render the marginal stop stationary with respect to the counterstop, operation governing means for said device including means adjustable along with said marginal stop, to cause said device to re spond to said control for effective action only in the event the marginal stop and said counterstop are in or approximate said engaged relation, or consequently to establishment of such relation through carriage movement under condition of operating force maintained on said con- 23 tml and means -for 'lsaid npe'ration governing ineansto cause ifnpartationof a signalling impulse-t6 said con'trol via said device when in the course of a marginal stop setting operation a marginal stop to be set nears engaged relation with the counterstop.

SEYED KHALIL.

REFERENCES CITED Number 24 UNITED STATES PATENTS Name Date Labofish Oct. 2'7, 1908 Sargent Feb. 1,1910 Thieme Apr. 23, 1912 Dillon' Mar. 9, 1915 Ramus Aug. 3, 1926 Olivetti Feb. 25, 1930 Scherer Apr. 7, 1931 Myers July 23, 1940 Bredimus Apr. 13, 1943 Schuyler Nov. 7, 1944 Brumhill Apr. 19, 1949 

